Air-cooling device for internal-combustion engines



L. E. CLAWSON. AIR.CO0LING DEVICE FOR INTERNAL COMBUSTION ENGINES. APPLlCATION FILED APR 12, 1920.

' 1,41 1,410. Patented Apr. 4, 192 2.

2 SHEETSSHEET I- INVENTOR' 674204 02 Z L, MA

A TTORNEYS L. E. CLAWSON.

AIR COOLING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR; I2, I920. I 1,41 1,410. Patented Apr. 4, 1922,

2 SHEETS-SHEET 2. Z

1N VEN TOR 6%;, QMMI ATTORNEY UNITED STATES PATENT OFFICE.

LEONARD n. cLAwsoN, or sAn FRANCISCO, CALIFORNIA.

Specification of Letters Patent.

Patented Apr. 4, 1922.

Application filed April 12, 1920. Serial No. 373,179.

, To all whom it may concern Be it knownthat I. LEONARD E. CLAW- SON, a citizen of the United States residing at the city and county of San Francisco and State of California. have invented a new and useful Improvement in Air-Cooling Devices for Internal-Combustion Engines. of which the following is a specification.

This invention relates to an air cooling device for internal combustion engines and especially to means for directing an air blast against the parts of an engine which are subjected to the greatest heat.

y One of the objects of the present invention is to provide a simple. cheaply manufac tured, easily installed air cooling device for internal combustion engines. especially adapted for automobiles and the like. and

particularly to provide a device of the character described which eliminates the use of water cooling attachments. such as radiators circulating pumps. jackets. etc.

Another object of the invention is to provide a blower adapted to be placed in front of the engine and driven thereby. and in conjunction therewith means for directing the air against the heads. cylinders and other parts of the engine which are subjected to excess heat.

Further objects will: hereinafter appear.

The invention consists of the parts and the construction, combination and arrangement of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in whieh- Fig. 1 is a side elevation of an internal combustion engine partly broken away. showing the application of the invention.

- Fig. 2 is a view of the opposite side of-the engine.

Fig.- 3 is a cross section of the engine, showing the application of the invention.

Fig. 4 is a detail view of the blower.

Fig. 5 is a detail cross section taken on line 5-5, Fig. 4.

Referring to the drawings in detail. A indicates'a standard form of internal combustion engine, 52; the cylinders. 3 the cylinder heads. and 4 the exhaust manifold.

Mounted on the front end of the engine is a bracket 5, and journalled therein is a shaft 6, on which is secured a blower 7 and a pulley 8. This pulley is driven by a belt'9 directly from the crank shaft of the engineand continuous rotation of the blower is thus insured whenever the engine is in operation.

The blowerhere shown is ot the rotary type (see Figs. at and 5.). the periphery of the blower being provided with a series of small angularly disposed vanes 10 and a series of larger directing vanes 11. The rotor of the blower is inclosed by a casing 12 and the air delivered thereto by the blower is directed to' the several parts of the engine by the tubes shown in Figs. 1. 2 and 3. i I

'By referring to the same figures it will be seen that the engine is inclosed bya casing 18. This casing entirely Slll'l'UlllMlS'tllt engine and is'spaced therefrom to form a surrounding chamber. It will also be seen that the upper part of the casing is open to permit a free QSCtLDG of air delivered thereto. Four pipes. such as indicated at 14. 15. It) and 17. areconnected with one side of the casing as shown in Fig. 1. and another set of pipes. consisting of four in number. as indicated at 15). 2t), 21 andQiZ. similarly form a connection between the blower housing and the opposite side of the casing 18. Each set of tubes directs an air blast against opposite s ides of the cylinders and then escapes in an upward direction over the heads and through the opening in the upper part of the casing.

13y referring to Fig. 2. it will be seen that another set of pipes. four in number. as indicated at 23. 24. 25 and 26. also form a conncction between the blower housing and the casing and that they direct an air blast against the exhaust manifold -l. Two other pipes are employed as shown at :27 and 28. The pipe 28 connects with a manifold :29 and thereby directs an air blast on top of the cylinder heads. Pipe 27 is connected with tl'ierefore directs an air blast through the jacket space surroimding the cylinders and then upwardlyaround the heads: the air admitted by the pipes 27 and being permitted to escape through an opening 31. formed at the rear end of the cylinder.

The engine shown in this instance is a Ford engine. This type of engine is provided with a jacket 32. which surrounds the cylinders. and similarly a jacket 33 which incloses the heads. the jacket 33 being provided with the manifold zththrough which the circulating water discharges. and the jacket 32 with the opening 30 through which um-00ithe lower portion of the jacket. as at 3U. and

' ingwater is admitted, that is ordinary Ford engines are water cooled, the water being admitted at and discharged through the manifold 29.

In the present instance I merely cut away a portion of the jacket at the rear end to form the opening 31, and

by directing an air blast through the connections 29 and 30, I force a suthcient volume of cool air through the jacket space to maintain any cylinder temperature desired. Cooling of the engine is of courseotherwise materially assisted by the other connections which direct a series of air blasts against the opposite sides of the cylinders as pre viously described.

From the foregoing ltcan be seeri that. a simple alr cooling device has been provided for automobile engines which may be attached whether-the cylinders are jacketed or otherwise, similarly that all water cooling Y. connections, such as radiators, circulating be cooled.

pumps, etc., may be entirely removed, thereby materially reducing the weight and cost of the engine. Automatic operation is insured due to the fact. that the blower cannot operate unless the en ine is started and the proportion of air de ivered to cool the en gine is always proportional to the speed' of the same as a direct driving connection is formed between the engine crank shaft and the blower shaft 6. Practically any cylinder temperature desired may in this manner be .obtained as the capacity of the blower may be with other methodsof cooling, and it should therefore be considered an important feature of the present invention.

Another feature to be considered is the fact that back pressure on the exhaust decidedly tends to heat an engine. I therefore provided means for permitting a free escape of the exhaust gases, first by providing a manifold having large passages formed therein, .and secondly-by providing an auxiliary manifold, such as shown at 4. This is connected with the forward end of the main manifold 4 and serves the purpose of by passing any gases, should there at any time be a tendency to form a back pressure. The manifolds 4 and 4 may be connected with mufflers if desired, but these should be of ample capacity as back pressure should be avoided as much as possible.

, aura-1o While a specific form of blower is here shown, I-wish it understood that any other i type suitable for the purpose may be employed; similarly that changes in the piping system and structure here shown may be resorted to within the scope of the appended claims. a

Haviiig thus described my invention, what I claim and desire to secureby Letters Patent is- L The combination with the cylinders of an internal combustion engine, of an open topped casing surrounding the sides, ends and bottom of the cylinder space, a rotary blower with a surrounding casing, a plurality of tubes connecting the blower casing with the engine casing and discharging at opposite sides of the engine cylinders, a second set of pipes discharging air from the blower casing to and around the exhaust manifold, and a final-set of pipes connecting the blower casing with the space on the top of the cylinder heads, and all of saidaid blasts passing to and out of the open top of the cylinder casing.

2. The combination with the cylinders and heads of an internal combustion engine, of a casing spaced from but enclosing the same, a plurality of pipes connecting the blower with one side of the casin and directing an air blast against each by lnder, a plurality of pipes connecting the blower with the other side of the casing and directing a series of air blasts against the opposite sides of the cylinders, and other pipes connecting the blower with the engine'and directing an air blast against the cylinder heads, the air of said: several blasts beingpermitted to escape throu h an opening formed in the upper part of t e casing.

.The combination with an internal combustion engine having a jacket formed around the cylinders and the heads, of means for directing an air blast throu h said jacket space both against the cylin ers and the heads, a discharge opening formed in said jackets for the escape of said air, a casing surrounding the cylinders and spaced 'therei from, the upper part of said casing being open, and means connected with the opposite sides of the casing for directing a series of air blasts against the opposite sides of the cylinders below the cylinder acket.

4. The combination with an internal combustion engine'having a jacket surrounding the cylinders and the head, of a casing surrounding the cylinders and spaced therefrom, a blower driven by the engine, a casing the surrounding the blower, a pipe connecting the blower with the cylinder head jacket, another pipe connectingthe blower with the cylinder jacket, a common dis- 'charge opening for the cylinder and head jacket, an exhaust manifold on the engine, a

. plurality of pipes connected with the blower In testimony whereof I have hereunto set my hand in the presence of two subserihing witnesses. 4

LEONARD E. CLUYSON.

\Vitnesses:

JOHN H. Hicmuxu, \V. \V. HEALEY. 

